support sinilink APP which can be downloaded on the webpage Feature 1 The original imported TPA3251D2 power amplifier chip scheme is adopted TPA3251D2 is a high performance class D power amplifier which has class D efficiency and can bring real high end sound quality The device features advanced integrated feedback design and proprietary high speed gate driver error correction pure path TM HD This technology can make the device maintain ultra low distortion in the whole audio frequency band and show high definition sound quality at the same time 2 Bluetooth compatible 5 1 audio power amplifier module 2 1 dual channel stereo output output power 220W 2 left and right channels 350W subwoofer pure HiFi sound quality The treble is pure and transparent the midrange is gentle and delicate and the bass is surging and shocking 3 Classic appearance multifunctional main knob the main knob adopts rotary encoder only used in high end power amplifier to realize 360 degree stepless tuning It feels smooth one key start and stop long press to start and stop and the operation is simple and convenient 4 Support mobile app control newly upgrade Sini link app Support to modify Bluetooth compatible name Set Bluetooth compatible password Off on tone5 Supported audio input Bluetooth compatible 5 1 AUX USB sound card USB flash disk the USB flash disk file system must be fat 32 and the maximum support is 32GB 6 Heat dissipation mechanism heat sink fan for